fix: regEx definitions that used regex literal and separate flags

[gost-serb]

Changes

Fix regEx definitions as described in this discussion

Also, add lastIndex reset in Conan data source getReleases otherwise it fails every second version.
Looks like re2 has the same behavior as native JS regExp:
I wonder why it wasn't caught by existing unit tests but I have the same behaviour on a real setup.
To reproduce the original bug execute the following code:

const RE2 = require('re2');

var r = new RE2(/foo/gim);
const samples = ['foo', 'foo42', 'aaafoo', 'bbbfoo', 'bbbfoo', 'cccfoo'];

for (x of samples) {
	console.log(x);
	console.log(r.exec(x));
}

Context

Closes #24622

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 36.106.2 🎉

The release is available on:

• GitHub release
• 36.106.2

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