fix(memcached): low cardinality span name

[aadharsh-rengarajan]

Which problem is this PR solving?

• Fixes Options to set only span key in span name of memcached instrumentation #1102

We have addressed the problem above by making the changes necessary and we can get the memcached value from the span attributes itself.

Short description of the changes

• Removed query.type from the span name as it creates a high cardinality of span names.
• The span name will be memcached get or memcached set. (Open to change this span name)

Checklist

• Ran npm test for the edited package(s) on the latest commit if applicable.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: aadharsh-rengarajan / name: aadharsh-rengarajan (fe86375)

[codecov]

Codecov Report

Merging #1104 (67d43f7) into main (4d62c92) will decrease coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1104      +/-   ##
==========================================
- Coverage   96.07%   95.95%   -0.12%     
==========================================
  Files          14       17       +3     
  Lines         892     1014     +122     
  Branches      191      210      +19     
==========================================
+ Hits          857      973     +116     
- Misses         35       41       +6     

Impacted Files	Coverage Δ
...y-instrumentation-memcached/src/instrumentation.ts	96.42% <100.00%> (ø)
...tapackages/auto-instrumentations-node/src/utils.ts	98.00% <0.00%> (ø)
...entelemetry-instrumentation-memcached/src/utils.ts	81.25% <0.00%> (ø)