feat: /template/rename to patch template name

[gt2345]

Ticket

MD-380

Description

Create a new endpoint /template/rename for patching template name. Duplicated name will be rejected.

Test Plan

PATCH /api/v1/template/rename takes old_name and new_name
Test the API with duplicated name and valid name.

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

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[codecov]

Codecov Report

Attention: Patch coverage is 61.22449% with 19 lines in your changes are missing coverage. Please review.

Project coverage is 45.15%. Comparing base (cc82cc9) to head (e9ec87d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9320      +/-   ##
==========================================
+ Coverage   45.13%   45.15%   +0.02%     
==========================================
  Files        1230     1230              
  Lines      154523   154572      +49     
  Branches     2405     2404       -1     
==========================================
+ Hits        69740    69798      +58     
+ Misses      84588    84579       -9     
  Partials      195      195              

Flag	Coverage Δ
backend	41.78% <86.36%> (+0.07%)	⬆️
harness	64.07% <40.74%> (-0.02%)	⬇️
web	36.06% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
master/internal/templates/api.go	73.20% <86.36%> (+1.54%)	⬆️
harness/determined/common/api/bindings.py	40.21% <40.74%> (+<0.01%)	⬆️

... and 5 files with indirect coverage changes

[kkunapuli]

Looks good to me - great work!