[CI] fix code coverage build

[cz4rs]

It seems like code coverage was not uploading correctly in Azure:

==> Uploading reports
    url: https://codecov.io/
    query: branch=&commit=feb3e5e699995900ef18859b99d69e9b2f64370f&build=&build_url=&name=&tag=&slug=DARMA-tasking%2Fvt&service=&flags=&pr=&job=&cmd_args=f
->  Pinging Codecov
[https://codecov.io/upload/v4?package=bash-1.0.6&token=<hidden>&package=bash-1.0.6&token=$(codecov_token)&branch=&commit=feb3e5e699995900ef18859b99d69e9b2f64370f&build=&build_url=&name=&tag=&slug=DARMA-tasking%2Fvt&service=&flags=&pr=&job=&cmd_args=f](https://codecov.io/upload/v4?package=bash-1.0.6&token=%3Chidden%3E&package=bash-1.0.6&token=$(codecov_token)&branch=&commit=feb3e5e699995900ef18859b99d69e9b2f64370f&build=&build_url=&name=&tag=&slug=DARMA-tasking%2Fvt&service=&flags=&pr=&job=&cmd_args=f)
{"message":"Repository not found"}

400

and it's also failing quietly in bake builds because of missing token:

#9 1619.4 ==> Uploading reports
#9 1619.4     url: https://codecov.io/
#9 1619.4     query: branch=&commit=feb3e5e699995900ef18859b99d69e9b2f64370f&build=&build_url=&name=&tag=&slug=DARMA-tasking%2Fvt&service=&flags=&pr=&job=&cmd_args=f
#9 1619.4 ->  Pinging Codecov
#9 1619.4 https://codecov.io/upload/v4?package=bash-1.0.6&token=<hidden>&package=bash-1.0.6&token=&branch=&commit=feb3e5e699995900ef18859b99d69e9b2f64370f&build=&build_url=&name=&tag=&slug=DARMA-tasking%2Fvt&service=&flags=&pr=&job=&cmd_args=f
#9 1619.7 {"message":"Token required - not valid tokenless upload"}

Fix the issue in gcc-11 bake build (we can ignore Azure build since we plan to remove it shortly).

[JacobDomagala]

@cz4rs @lifflander
For Azure we didn't add codecov_token to gcc-11 pipeline - it's still only added in gcc-7 (our old codecov pipeline)

In order for it to work with bake, we should add the same secret to github.