fix(aws-sdk): sns-sqs extract the correct context key from message payload

[habmic]

Which problem is this PR solving?

• When using SNS to SQS integration and 'raw messages' are off, it searches for the propagation context in the wrong field.

Short description of the changes

• it used to search only for StringValue now it will also look for Value

[codecov]

Codecov Report

Merging #761 (e295fe3) into main (0463f27) will decrease coverage by 0.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #761      +/-   ##
==========================================
- Coverage   96.87%   96.37%   -0.50%     
==========================================
  Files          11       26      +15     
  Lines         640     1767    +1127     
  Branches      126      231     +105     
==========================================
+ Hits          620     1703    +1083     
- Misses         20       64      +44     

Impacted Files	Coverage Δ
...emetry-instrumentation-aws-sdk/src/services/sns.ts	93.33% <0.00%> (ø)
...etry-instrumentation-aws-sdk/test/dynamodb.test.ts	100.00% <0.00%> (ø)
...ntation-aws-sdk/src/services/ServicesExtensions.ts	100.00% <0.00%> (ø)
...entation-aws-sdk/src/services/MessageAttributes.ts	87.09% <0.00%> (ø)
...emetry-instrumentation-aws-sdk/src/services/sqs.ts	89.65% <0.00%> (ø)
...opentelemetry-instrumentation-aws-sdk/src/utils.ts	97.29% <0.00%> (ø)
...ry-instrumentation-aws-sdk/test/aws-sdk-v3.test.ts	100.00% <0.00%> (ø)
...entelemetry-instrumentation-aws-sdk/src/aws-sdk.ts	96.91% <0.00%> (ø)
...etry-instrumentation-aws-sdk/test/testing-utils.ts	100.00% <0.00%> (ø)
...ry-instrumentation-aws-sdk/test/aws-sdk-v2.test.ts	100.00% <0.00%> (ø)
... and 5 more