API feedback

[martintmk]

Details on the issue fix or feature implementation

• EnableTelemetry -> ConfigureTelemetry
• In ResilienceStrategyRegistry and ResilienceStrategyProvider some methodnames are more explicit Get -> GetStrategy
• AddStrategy extension method now returns the builder instead of just void. (reported in Observations about v8 API #1324)

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

Merging #1327 (d4ce5d4) into main (04bd9ec) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1327   +/-   ##
=======================================
  Coverage   83.49%   83.49%           
=======================================
  Files         269      269           
  Lines        6379     6379           
  Branches     1004     1004           
=======================================
  Hits         5326     5326           
  Misses        844      844           
  Partials      209      209           

Flag	Coverage Δ
linux	?
macos	83.49% <100.00%> (ø)
windows	83.49% <100.00%> (ø)

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

Impacted Files	Coverage Δ
src/Polly.Core/ResilienceStrategyBuilderBase.cs	100.00% <ø> (ø)
...c/Polly.Core/Retry/RetryStrategyOptions.TResult.cs	100.00% <ø> (ø)
...rcuitBreakerResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)
.../Polly.Core/Registry/ResilienceStrategyProvider.cs	100.00% <100.00%> (ø)
.../Polly.Core/Registry/ResilienceStrategyRegistry.cs	100.00% <100.00%> (ø)
.../Polly.Core/ResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)
.../Retry/RetryResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)
...dencyInjection/PollyServiceCollectionExtensions.cs	100.00% <100.00%> (ø)
...ry/TelemetryResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)
.../RateLimiterResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)