fix: Move utf7 encoding primitives to the module codebase

[mykola-mokhnach]

The https://www.npmjs.com/package/utf7 package has been released 7 years ago for the last time and thus has vulnerable dependencies:

node_modules/@babel/core/node_modules/semver
node_modules/@babel/helper-compilation-targets/node_modules/semver
node_modules/istanbul-lib-instrument/node_modules/semver
node_modules/make-dir/node_modules/semver
node_modules/npm-run-all/node_modules/semver
node_modules/read-pkg-up/node_modules/semver
node_modules/read-pkg/node_modules/semver
node_modules/utf7/node_modules/semver
  utf7  >=1.0.2
  Depends on vulnerable versions of semver
  node_modules/utf7
    appium-adb  >=7.20.0
    Depends on vulnerable versions of utf7
    node_modules/appium-adb

vm2  *
Severity: critical
vm2 Sandbox Escape vulnerability - https://github.com/advisories/GHSA-cchq-frgv-rjh5
vm2 Sandbox Escape vulnerability - https://github.com/advisories/GHSA-g644-9gfx-q4q4
No fix available

I have ported the actual code from the original module (there's not much) to a local helper file to get rid of vulnerable dependencies

[github-actions]

🎉 This PR is included in version 9.14.9 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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