GRPC instrumentation. Added new attributes according to the OpenTelemetry rpc convention

[andrewzenkov]

This PR is extending old one. Feel free to check it if needs comments

Which problem is this PR solving?

Opentelemtry grpc instrumentation is not consistent in terms of creating grpc attributes in requests.
For example in Java/Python instrumentations it contains necessary attributes for grpc connection:

• rpc.method
• rpc.service
• rpc.system

But these attributes are missed in js grpc instrumentation. It doesn't set attributes.
Additionally, if compare Python/Java and Nodejs attributes.
Already existing attribute rpc.method is implemented incorrectly in Nodejs.

opentelemetry-js/experimental/packages/opentelemetry-instrumentation-grpc/src/grpc-js/clientUtils.ts

Line 131 in 747c404

[AttributeNames.GRPC_METHOD]: original.path,

Fixes # (issue)

Short description of the changes

• Renamed rpc.method from grpc.method to rpc.method attribute (Client, Server)
• Added rpc.service attribute (Client, Server)
• Added rpc.system attribute (Client, Server)
• Fixedrpc.method value calculating for some use case. (it should be method, but value is just full path)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Create GRPC example, run opentelemetry SDK using authoinstrumentation, or manually set new GrpcInstrumentation(), you will see that Grpc instrumentation detects grpc connection and creates spans but with missing attributes:

• rpc.method (server?/client?)
• rpc.system (server/client)
• rpc.service (server/client)

And for client rpc.method has incorrect value.

opentelemetry-js/experimental/packages/opentelemetry-instrumentation-grpc/src/grpc-js/clientUtils.ts

Line 131 in 747c404

[AttributeNames.GRPC_METHOD]: original.path,

Before:
Client/server

After:
Client/Server

[dyladan]

Title isn't very specific as to what is actually happening. Please make a more descriptive title (and add it to changelog)

[codecov]

Codecov Report

Merging #3127 (3657cd2) into main (fc4dcba) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3127      +/-   ##
==========================================
- Coverage   93.10%   93.09%   -0.01%     
==========================================
  Files         195      196       +1     
  Lines        6384     6391       +7     
  Branches     1348     1348              
==========================================
+ Hits         5944     5950       +6     
- Misses        440      441       +1     

Impacted Files	Coverage Δ
...ry-instrumentation-grpc/src/grpc-js/clientUtils.ts	92.50% <ø> (-0.10%)	⬇️
...metry-instrumentation-grpc/src/grpc/clientUtils.ts	88.23% <ø> (-0.18%)	⬇️
...y-instrumentation-grpc/src/enums/AttributeNames.ts	100.00% <100.00%> (ø)
...-instrumentation-grpc/src/enums/AttributeValues.ts	100.00% <100.00%> (ø)
...elemetry-instrumentation-grpc/src/grpc-js/index.ts	91.26% <100.00%> (+0.35%)	⬆️
...entelemetry-instrumentation-grpc/src/grpc/index.ts	93.27% <100.00%> (+0.17%)	⬆️
...es/opentelemetry-instrumentation-grpc/src/utils.ts	94.73% <100.00%> (+0.79%)	⬆️
...-trace-base/src/platform/node/RandomIdGenerator.ts	87.50% <0.00%> (-6.25%)	⬇️