Remove filter of instance types prefix

[hanwen-cluster]

Description

ParallelCluster CLI doesn't limit the instance types. So in UI, we shouldn't limit any instance types.

Changes

After this PR, the instance type drop-down list will include all instance types available in the region

References

This PR addresses aws/aws-parallelcluster#6920

PR Quality Checklist

• I added tests to new or existing code
• I removed hardcoded strings and used react-i18next library (useTranslation hook and/or Trans component), see an example here
• I made sure no sensitive info gets logged at any time in the codebase (see here) (e.g. no user info or details, no stacktraces, etc.)
• I made sure that any GitHub issue solved by this PR is correctly linked
• I checked that infrastructure/update_infrastructure.sh runs without any error
• I checked that npm run build builds without any error
• I checked that clusters are listed correctly
• I checked that a new cluster can be created (config is produced and dry run passes)
• I checked that login and logout work as expected

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