fix: aws role session name

[koladilip]

Description

AWS role session name should not contain any spaces so replacing space with hyphen.

Notion Ticket

https://www.notion.so/rudderstacks/Add-AWS-IAM-role-option-for-S3-Lambda-Eventbridge-Kinesis-Firehose-Personalize-destinations-b67c98e8425f4ef8b1b6b906fff08484

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Base: 45.51% // Head: 45.48% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (1e2ca7a) compared to base (d01f98b).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2712      +/-   ##
==========================================
- Coverage   45.51%   45.48%   -0.03%     
==========================================
  Files         289      289              
  Lines       48007    48007              
==========================================
- Hits        21852    21838      -14     
- Misses      24775    24785      +10     
- Partials     1380     1384       +4     

Impacted Files	Coverage Δ
processor/stash/stash.go	44.56% <100.00%> (ø)
utils/awsutils/session.go	96.66% <100.00%> (ø)
services/rsources/handler.go	70.83% <0.00%> (-0.84%)	⬇️
processor/processor.go	85.99% <0.00%> (-0.42%)	⬇️
router/router.go	73.80% <0.00%> (-0.19%)	⬇️

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