Replace Jaro-Winkler algorithm usage with an internal function

[yigithankarabulut]

What type of PR is this?

• cleanup

What this PR does / why we need it:

To support the goal of only requiring the Go standard library. We were using the Jaro-Winkler algorithm for the suggestion from the "xrash/smetrics" package. This function was rewritten to be faithful to stdlib.

Which issue(s) this PR fixes:

Fixes #1892

Testing

go test -run=TestJaroWinkler

Release Notes

(REQUIRED)

[yigithankarabulut]

Probably the rate limit was reached in the check and failed. The remaining steps were therefore canceled.

[avorima]

Please run go mod tidy to remove the dependency completely

[bartekpacia]

I appreciate the goal to depend on Go's stdlib only :)

[bartekpacia]

I'd add that the result is between 0 or 1. This description at first made me think the output is either 0 or 1, only.

[bartekpacia]

LGTM, thank you for contributing :)

[meatballhat]

Sorry about the trouble with codecov 😩 I'll get a token set up as soon as I can!

Update: it's already set up, but I'm assuming the token expired (??) Anyway, I updated it and now I'll re-run the failed checks.

Update Update: Uhhhh the token is updated and appears to be in use, and we're still getting rate limit failure. I think the failing step should probably get a continue-on-error: true

Update 3x: #1898

[meatballhat]

Lovely, @yigithankarabulut! Thanks so much 🤘🏼

[yigithankarabulut]

@meatballhat You can be sure there will be more to come. Let's go!

[bartekpacia]

Go go go! :D