chore: release proposal v1.1.1

[dyladan]

• #2849 fix: correct changelog and compat matrix for 1.1 release (@Flarna)
• #2823 fix: enable downlevelIteration for es5 targets (@legendecas)
• #2844 chore: add prepublishOnly to ensure a full build (@legendecas)

[codecov]

Codecov Report

Merging #2853 (95de19e) into main (1f0f6d9) will increase coverage by 0.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2853      +/-   ##
==========================================
+ Coverage   93.19%   93.52%   +0.32%     
==========================================
  Files         157      163       +6     
  Lines        5117     5572     +455     
  Branches     1097     1180      +83     
==========================================
+ Hits         4769     5211     +442     
- Misses        348      361      +13     

Impacted Files	Coverage Δ
...emetry-instrumentation-xml-http-request/src/xhr.ts	97.57% <0.00%> (ø)
...exporter-metrics-otlp-http/src/transformMetrics.ts	95.65% <0.00%> (ø)
...ation-xml-http-request/src/enums/AttributeNames.ts	100.00% <0.00%> (ø)
...-instrumentation-fetch/src/enums/AttributeNames.ts	100.00% <0.00%> (ø)
...s/opentelemetry-instrumentation-fetch/src/fetch.ts	97.00% <0.00%> (ø)
...mentation-xml-http-request/src/enums/EventNames.ts	100.00% <0.00%> (ø)