fix!(mysql*,redis): net.peer.ip -> db.connection_string

[trask]

BEGIN_COMMIT_OVERRIDE
fix(mysql*,redis)!: net.peer.ip -> db.connection_string
END_COMMIT_OVERRIDE

Which problem is this PR solving?

• mysql, mysql2, redis and ioredis instrumentation was capturing the connection string in the net.peer.ip attribute

Short description of the changes

• changes these instrumentations (except ioredis, because that change seems to be hanging CI not sure why, I'll send PR for that change separately) to capture the connection string in the db.connection_string attribute

[I have other thoughts about whether db.connection_string should be captured at all in these cases (when it's a synthetically reconstructed value from existing telemetry data like net.peer.name, net.peer.port, db.name), but I will seek to clarify that point in the specification as it's unclear (see also open-telemetry/opentelemetry-java-instrumentation#3080)]

[codecov]

Codecov Report

Merging #913 (5a7148a) into main (760c4d4) will decrease coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #913      +/-   ##
==========================================
- Coverage   95.91%   95.65%   -0.26%     
==========================================
  Files          13       20       +7     
  Lines         856     1244     +388     
  Branches      178      244      +66     
==========================================
+ Hits          821     1190     +369     
- Misses         35       54      +19     

Impacted Files	Coverage Δ
...e/opentelemetry-instrumentation-mysql/src/utils.ts	100.00% <ø> (ø)
.../opentelemetry-instrumentation-mysql2/src/utils.ts	100.00% <ø> (ø)
...e/opentelemetry-instrumentation-redis/src/utils.ts	93.10% <ø> (ø)
...tapackages/auto-instrumentations-node/src/utils.ts	97.87% <0.00%> (ø)
...metry-instrumentation-mysql/src/instrumentation.ts	93.33% <0.00%> (ø)
...metry-instrumentation-redis/src/instrumentation.ts	93.47% <0.00%> (ø)
...etry-instrumentation-mysql2/src/instrumentation.ts	95.00% <0.00%> (ø)

[dyladan]

WRT fix conventional commit subject, I think it might be better to use fix! to indicate this is a breaking change which will bump the semver minor (treated as major before 1.0) version.