[management] cleanup resources when ws-grpc proxy connection goes away (#7484)

* ws to grpc connection adapter

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* support for timeouts on reading h2 stream headers

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* cleanups

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* we can't always expect a DATA frame, as not all http methods send it

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* set default headers read timeout to 10s

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fix a race in tests

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* remove frame interceptor

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* cleanup test cleanup

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* make linter happy

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* removed unused consts

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* set 5s ReadTimeout

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* making linter happy

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* making linter happy

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* updated comments

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fix spelling

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* disabled all http server read timeouts

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* Revert "disabled all http server read timeouts"

This reverts commit adf5005ba44d42f620d3a0a0851df9854cfd180d.

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* clarify comment re: ReadTimeout/WriteTimeout issues

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

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Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>