aws: allow EC2 instance access to metadata tags

[cej-harris]

At the moment it is not possible to allow EC2 instances to access their metadata tags when they are created. The changes in this PR adds a field within the AWS backend to create EC2 instances, specifying if the InstanceMetadataTags option in InstanceMetadataOptions is disabled (the default) or enabled. This option can be configured with the instance_metadata_tags option in runner-manager.yaml

[tcarmet]

LGTM, thanks for the contribution !

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.74%. Comparing base (e4e66df) to head (edb5285).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #681      +/-   ##
==========================================
+ Coverage   86.72%   86.74%   +0.01%     
==========================================
  Files          34       34              
  Lines        1431     1433       +2     
==========================================
+ Hits         1241     1243       +2     
  Misses        190      190              

Flag	Coverage Δ
api	64.89% <66.66%> (-0.03%)	⬇️
unit	67.48% <100.00%> (+0.04%)	⬆️

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