Opt language hosts out of PULUMI_IGNORE_AMBIENT_PLUGINS

[iwahbe]

Description

Opt language hosts out of PULUMI_IGNORE_AMBIENT_PLUGINS. Currently, setting PULUMI_IGNORE_AMBIENT_PLUGINS breaks the Automation API because the Automation API does not have a language specific package manager to fall back to.

Checklist

• I have added tests that prove my fix is effective or that my feature works

• I have updated the CHANGELOG-PENDING file with my change

• Yes, there are changes in this PR that warrants bumping the Pulumi Service API version

[codecov]

Codecov Report

Merging #8576 (0d49bcd) into master (457ee06) will decrease coverage by 18.47%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master    #8576       +/-   ##
===========================================
- Coverage   58.69%   40.22%   -18.48%     
===========================================
  Files         634      627        -7     
  Lines       96946    94705     -2241     
  Branches     1378     1378               
===========================================
- Hits        56902    38094    -18808     
- Misses      36780    53972    +17192     
+ Partials     3264     2639      -625     

Impacted Files	Coverage Δ
sdk/go/common/workspace/plugins.go	50.43% <100.00%> (-5.78%)	⬇️
pkg/codegen/docs.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/codegen/go/gen_spill.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/codegen/dotnet/templates.go	0.00% <0.00%> (-100.00%)	⬇️
sdk/go/common/resource/stack.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/codegen/internal/utils/host.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/codegen/hcl2/model/format/func.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/codegen/python/python.go	0.00% <0.00%> (-97.80%)	⬇️
pkg/codegen/utilities_types.go	3.54% <0.00%> (-96.46%)	⬇️
pkg/codegen/go/gen_program_optionals.go	0.00% <0.00%> (-94.21%)	⬇️
... and 164 more

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[t0yv0]

Does what it says, LGTM.