Your first text, 2 Corinthians 12:11-12 -
This shows that when Christ's chosen apostles performed signs, wonders and miracles in the first century A.D., that could be taken as confirmation that they were called of God, as ambassadors for Christ. But it wasn't the signs, in themselves, that were the proof (see my answer further down) - they were confirmation.
Your second text, Luke 7:20-22 -
This has nothing to do with evidence of an authentic, divine calling, because it was Jesus' response to John the Baptist's query about whether Jesus was the foretold Messiah or not. John the Baptist was in prison, his life under threat, and he had not seen any re-establishment of the Kingdom of God on earth (as most Jews expected would literally happen, when Messiah came.) Jesus performed miracles for the messengers to report back to John with, that Messiah surely had come. John the Baptist himself is not recorded as having performed any miraculous signs or wonders yet he unarguably had a divine calling - to prepare the way for Messiah. Obviously, if Messiah performed no signs, wonders and miracles, that would show he was not the Messiah, given all the Old Testament prophecies about that, but what Jesus did there in response to John's concerns was to assure John that his ministry of preparation had not been in vain. Messiah was here! Paul said, "John's baptism was a baptism of repentance. He told the people to believe in the one coming after him, that is, in Jesus" (Acts 19:4). As John knew his ministry was ending, he sought assurance from Jesus that his ministry had not been in vain, and Jesus assured him.
Your third text, Matthew 7:21-23 -
This was in context of Jesus just having warned his followers about false prophets creeping in to deceive. Despite claiming to have performed signs, wonders and miracles, Jesus would disown them on the Day of Judgment, and cast them away. Jesus does not judge by outward appearances. He is not fooled by counterfeit signs. He made the simple point that false prophets have the bad 'fruit' of false prophecy. That is how Christians are to test their claims - not go by outwards signs or appearances. But the false prophets are most anxious never to draw attention to prophecies they made that turned out to be false - they point to the signs and wonders they claim to do.
So, the point Jesus made is that authenticity of a divine calling is for any prophecies uttered in Jesus' name to happen, as foretold. Never mind showy, entertaining performances those ones might do get people gasping in wonder. Check out their words. It is authentic ministry of the word that can save souls, not getting them to jump up in an auditorium, saying they feel 'healed'. Paul's ministry was to "reason with them from the Scriptures, explaining and proving that the Christ had to suffer and rise from the dead" (Acts 17:2-4). An authentic, divine ministry will speak words of truth about Christ, and the gospel, and that will bring forth the good 'fruit' of souls saved.
Please also note how the New Testament exposes even truthful statements that have demonic spirit powers at back of them - as with the girl who publicly acclaimed two apostles and their message - they cast that spirit of divination out of her.
The supreme evidence of an authentic, divine calling is proclamation of the authentic, biblical gospel. Note how Paul and Barnabas warned the citizens of Antioch that "It was necessary that the word of God should first have been spoken to you, but seeing ye put if from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles" (Acts 13:46). The proclaiming of the true gospel is the vital evidence of those whom God has called. Especially in this day when so many false gospels are attracting millions! Indeed, Revelation warns of a particular 'false prophet' that will arise to mislead the whole world with miraculous signs and wonders. It also speaks of a global system designed to make people think this is "the lamb" of God, but when it speaks, it speaks as a dragon and deceives all who dwell on the earth by means of its signs (Revelation 13:11-14 & 16:13-14).
Conclusion of the Matter - The truth has to be spoken by authentic, divinely called ministers of Christ. That's the evidence - proclaiming gospel truth, unadulterated by man-made additions or subtractions - for it is the Spirit of Truth that fills them (John 16:13). But if people will not harken to gospel truth, neither will they be persuaded if miracles are performed. Those who seek signs and wonders will get them all right, but the spirit behind them will be demonic, especially as we approach Christ's sudden return. Not even that angel symbolically flying in mid-heaven, declaring the everlasting gospel, will be heeded. No call to fear God, to repent, and to worship him will cause sign-seekers to repent (Revelation 14:6-7). This means that the answer to your question is, "No - at best they can only ever be back-up, confirmation, of the divine calling to proclaim the truth of Christ."