E2E tests don't run on arm64, install is specific to linux

[michel-laterman]

E2E tests have hard coded assumptions that it runs linux/amd64.

Additionally the agent install tests only work on linux/amd64 (darwin untested).

At a minimum we should make the test-e2e and test-int targets run on arm64 hosts.

Additionally we can test to see if we can get the install e2e tests running on darwin and windows machines.
Windows machines will require extra steps that we may want in another issue:

• run the tests's install without sudo
• fix TearDownTest() to uninstall the agent without sudo
• fix the suite's TearDownSuite() function to work across OS'

[michel-laterman]

#3904 allows e2e tests to run on arm machines