chore: skip tests for aws-sdk instrumentation on node 8 and 10

[rauno56]

Which problem is this PR solving?

Strictly speaking we don't have a problem yet. aws-sdk is kind enough to give us a heads up during our tests:

@opentelemetry/instrumentation-aws-sdk: -- running test "npm run test" with aws-sdk (env: {})
@opentelemetry/instrumentation-aws-sdk: > @opentelemetry/instrumentation-aws-sdk@0.6.0 test /home/runner/work/opentelemetry-js-contrib/opentelemetry-js-contrib/plugins/node/opentelemetry-instrumentation-aws-sdk
@opentelemetry/instrumentation-aws-sdk: > nyc ts-mocha -p tsconfig.json --require '@opentelemetry/contrib-test-utils' 'test/**/*.test.ts'
@opentelemetry/instrumentation-aws-sdk: (node:72835) NodeDeprecationWarning: The AWS SDK for JavaScript (v3) will
@opentelemetry/instrumentation-aws-sdk: no longer support Node.js v10.24.1 as of January 1, 2022.
@opentelemetry/instrumentation-aws-sdk: To continue receiving updates to AWS services, bug fixes, and security
@opentelemetry/instrumentation-aws-sdk: updates please upgrade to Node.js 12.x or later.

It says they are not supporting anything below node 12 anymore. as of January 1st, 2022.

Short description of the changes

Disable running aws-sdk tests on node 8 and 10 before it actually breaks and causes confusion.

Checklist

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

[codecov]

Codecov Report

Merging #951 (d46782f) into main (ffc8faa) will increase coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #951      +/-   ##
==========================================
+ Coverage   95.91%   96.05%   +0.14%     
==========================================
  Files          13       24      +11     
  Lines         856     1395     +539     
  Branches      178      289     +111     
==========================================
+ Hits          821     1340     +519     
- Misses         35       55      +20     

Impacted Files	Coverage Δ
...try-instrumentation-aws-sdk/src/services/lambda.ts	97.77% <0.00%> (ø)
...opentelemetry-instrumentation-aws-sdk/src/utils.ts	97.36% <0.00%> (ø)
...opentelemetry-instrumentation-aws-sdk/src/enums.ts	100.00% <0.00%> (ø)
...emetry-instrumentation-aws-sdk/src/services/sqs.ts	89.65% <0.00%> (ø)
...entelemetry-instrumentation-aws-sdk/src/aws-sdk.ts	97.44% <0.00%> (ø)
...emetry-instrumentation-aws-sdk/src/services/sns.ts	93.75% <0.00%> (ø)
...tapackages/auto-instrumentations-node/src/utils.ts	97.91% <0.00%> (ø)
...y-instrumentation-aws-sdk/src/services/dynamodb.ts	100.00% <0.00%> (ø)
...etry-instrumentation-aws-sdk/src/services/index.ts	100.00% <0.00%> (ø)
...entation-aws-sdk/src/services/MessageAttributes.ts	90.32% <0.00%> (ø)
... and 1 more