feat: add forming grpc reqeuest url if rpc attributes are present

[kotharironak]

Description

For RPC methods, we show URL/URI as a combination of rpc.service and rpc.method. The same information is also available as Span Name - https://github.com/open-telemetry/opentelemetry-specification/blob/3e380e249f60c3a5f68746f5e84d10195ba41a79/specification/trace/semantic_conventions/rpc.md#span-name

It has been observed that spanName is not correctly set on certain scenarios. However, the span contains rpc.service and rpc.method attribute correctly set. So, as part of this PR, we will first look into RPC attributes if a protocol is grpc, and if those are not present, we will fall back to eventName which is nothing but spanName.

Testing

Added unit tests

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #280 (5d8d97a) into main (ece2263) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main     #280   +/-   ##
=========================================
  Coverage     79.07%   79.07%           
  Complexity     1231     1231           
=========================================
  Files           110      110           
  Lines          4861     4861           
  Branches        440      440           
=========================================
  Hits           3844     3844           
  Misses          813      813           
  Partials        204      204           

Flag	Coverage Δ
unit	79.07% <100.00%> (ø)

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Impacted Files	Coverage Δ
...ewgenerator/generators/SpanEventViewGenerator.java	92.12% <100.00%> (ø)

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[github-actions]

Unit Test Results

  73 files  ±0    73 suites  ±0   1m 1s ⏱️ -6s
390 tests +3  390 ✔️ +3  0 💤 ±0  0 ❌ ±0 

Results for commit 30f0a7b. ± Comparison against base commit ece2263.