Use version as query param to cache bust theme styles

[Waseem826]

What this PR does / why we need it:
Since theme files (dark.scss, light.scss, custom.scss) don't have any hash in their names (like styles.*.scss) and we have to load them manually on the basis of selected theme, these files are cached by browser and sometimes lead to unexpected behaviour.
This PR adds current release tag inside the file URL to bust the cache and load latest version of these files.

For example (note file size):

v2.22.0:

v2.22.2:

Which issue(s) this PR fixes:

Fixes #5583

What type of PR is this?

/kind bug

Special notes for your reviewer:

Does this PR introduce a user-facing change? Then add your Release Note here:

Add cache busting mechanism for theme styles.

Documentation:

NONE

[ahmedwaleedmalik]

/approve

[kubermatic-bot]

LGTM label has been added.

Git tree hash: b1908581e2064f613d7aaa95abd782f9df3ebce3

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahmedwaleedmalik, Waseem826

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• modules/web/src/OWNERS [Waseem826,ahmedwaleedmalik]

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