feat: adds correct user-agent information header to calls

[karel-rehor]

Closes #

Proposed Changes

• Default Node Rest user-agent header updated to influxdb3-js/<version>
• Same user-agent header added to gRPC
• Tests updated to cover these changes

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [x] Tests pass
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.47%. Comparing base (d7a8e47) to head (e2d13af).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #319 +/- ## ======================================= Coverage 96.46% 96.47% ======================================= Files 23 23 Lines 906 907 +1 Branches 214 214 ======================================= + Hits 874 875 +1 Misses 7 7 Partials 25 25 ```

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