Allow : in Tags with Escape Character

[samuhale]

Is this a bug fix or adding new feature?
Adding support for : in tag names using \ as an escape character

What is this PR about? / Why do we need it?
Issue #1689

What testing is done?
Added additional check to ensure tag parsing works with the escape character and without it, ran them with make test

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: samuhale / name: Sam Hale (3b9591a)

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[dankova22]

/ok-to-test

[samuhale]

Ran gofmt on files I changed, only changes are whitespace and removing an unneeded semicolon

[dankova22]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dankova22, samuhale

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