Relax protobuf version requirement to support v6 (#4620)

* Relax protobuf version requirement to support v6

Fixes #4563

* Update test-requirements to protobuf6

* uv pip compile oldest and latest requirements for opentelemetry-proto

* uv pip compile oldest and latest requirements for OTLP gRPC exporter

This uncovered some incompatibilty with oldest versions listed in pyproject.toml which I fixed.

* Use newer protobuf to avoid dependabot issues

* Generate workflows

* Cleanup tox issues and old requirements files

* add changelog

* Update CHANGELOG.md

* undo zipkin change

* Update CHANGELOG.md

---------

Co-authored-by: Aaron Abbott <[email protected]>
Co-authored-by: emdneto <[email protected]>
Co-authored-by: Riccardo Magliocchetti <[email protected]>

Author: 4 people

.github/workflows/lint_0.yml

@@ -47,8 +47,8 @@ jobs:
       - name: Run tests
         run: tox -e lint-opentelemetry-api
 
-  lint-opentelemetry-proto-protobuf5:
-    name: opentelemetry-proto-protobuf5
+  lint-opentelemetry-proto-gen-latest:
+    name: opentelemetry-proto-gen-latest
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
@@ -64,7 +64,7 @@ jobs:
         run: pip install tox
 
       - name: Run tests
-        run: tox -e lint-opentelemetry-proto-protobuf5
+        run: tox -e lint-opentelemetry-proto-gen-latest
 
   lint-opentelemetry-sdk:
     name: opentelemetry-sdk
@@ -218,8 +218,8 @@ jobs:
       - name: Run tests
         run: tox -e lint-opentelemetry-exporter-otlp-combined
 
-  lint-opentelemetry-exporter-otlp-proto-grpc:
-    name: opentelemetry-exporter-otlp-proto-grpc
+  lint-opentelemetry-exporter-otlp-proto-grpc-latest:
+    name: opentelemetry-exporter-otlp-proto-grpc-latest
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
@@ -235,7 +235,7 @@ jobs:
         run: pip install tox
 
       - name: Run tests
-        run: tox -e lint-opentelemetry-exporter-otlp-proto-grpc
+        run: tox -e lint-opentelemetry-exporter-otlp-proto-grpc-latest
 
   lint-opentelemetry-exporter-otlp-proto-http:
     name: opentelemetry-exporter-otlp-proto-http