Remove code and test to generate flamegraph on GetPage requests. (#3257)

It was nice to have and useful at the time, but unfortunately the method
used to gather the profiling data doesn't play nicely with 'async'. PR
#3228 will turn 'get_page_at_lsn' function async, which will break the
profiling support. Let's remove it, and re-introduce some kind of
profiling later, using some different method, if we feel like we need it
again.

test_runner/fixtures/neon_fixtures.py

@@ -1980,10 +1980,6 @@ class NeonPageserver(PgProtocol):
         if '"testing"' not in self.version:
             pytest.skip("pageserver was built without 'testing' feature")
 
-    def is_profiling_enabled_or_skip(self):
-        if '"profiling"' not in self.version:
-            pytest.skip("pageserver was built without 'profiling' feature")
-
     def http_client(self, auth_token: Optional[str] = None) -> PageserverHttpClient:
         return PageserverHttpClient(
             port=self.service_port.http,

test_runner/fixtures/utils.py

@@ -148,7 +148,7 @@ def get_scale_for_db(size_mb: int) -> int:
 
 
 ATTACHMENT_NAME_REGEX: re.Pattern = re.compile(  # type: ignore[type-arg]
-    r"flamegraph\.svg|regression\.diffs|.+\.(?:log|stderr|stdout|filediff|metrics|html)"
+    r"regression\.diffs|.+\.(?:log|stderr|stdout|filediff|metrics|html)"
 )