Debug adapter consumes CPU when large messages are printed

Adding:

print('A' * 5000);

To a Fluter project and then running it causes a hang (around 45 seconds on my machine) for the print. Larger messages take many minutes.

The time is being spent in looking for stack frames:

const frame = this.getStackFrameData(message) || this.getWebStackFrameData(message) || this.getMessageWithUriData(message);

These regexes were modified in the latest release, so it's likely those changes have caused this.

Redo stack frame parsing to avoid catastrophic backtracking

Don't try to parse stack frames from large messages

Redo stack frame parsing to avoid catastrophic backtracking

Don't try to parse stack frames from large messages

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