EC2 default test with new sample apps deployment

[Jeel-mehta]

Issue description:

Description of changes: I have made several changes to accommodate the dynamic version handling for dotnet support. This will check the e2e EC2 test for both versions for all regions. I am attaching a link that reflects the same changes on my repository and with the region us-east-1. Here is the link: https://github.com/Jeel-mehta/aws-application-signals-test-framework/actions/runs/12420969815

Rollback procedure:

<Can we safely revert this commit if needed? If not, detail what must be done to safely revert and why it is needed.>

Ensure you've run the following tests on your changes and include the link below:

To do so, create a test.yml file with name: Test and workflow description to test your changes, then remove the file for your PR. Link your test run in your PR description. This process is a short term solution while we work on creating a staging environment for testing.

NOTE: TESTS RUNNING ON A SINGLE EKS CLUSTER CANNOT BE RUN IN PARALLEL. See the needs keyword to run tests in succession.

• Run Java EKS on e2e-playground in us-east-1 and eu-central-2
• Run Python EKS on e2e-playground in us-east-1 and eu-central-2
• Run metric limiter on EKS cluster e2e-playground in us-east-1 and eu-central-2
• Run EC2 tests in all regions
• Run K8s on a separate K8s cluster (check IAD test account for master node endpoints; these will change as we create and destroy clusters for OS patching)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[majanjua-amzn]

Need a more recent test run to prove it works, try recreating your branch on the main repo and running the test by calling the workflow on your branch.

[majanjua-amzn]

nit: Should use 8.0 as default

Suggested change

	if [[ "${var.language_version}" == "8.0" ]]; then
	sudo dnf install -y dotnet-sdk-8.0
	else
	sudo dnf install -y dotnet-sdk-6.0
	fi
	if [[ "${var.language_version}" == "6.0" ]]; then
	sudo dnf install -y dotnet-sdk-6.0
	else
	sudo dnf install -y dotnet-sdk-8.0
	fi

[majanjua-amzn]

nit: Same here