Add HTTP URL filter

[glrf]

We added support for filtering on HTTP URLs in cilium/cilium#28275. This PR adds this feature in the CLI by adding a new flag --http-url

Fixes: #925

[maintainer-s-little-helper]

Commit 04f7aac does not match "Signed-off-by".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/contributing/#developer-s-certificate-of-origin

[kaworu]

Static check failed with

level=error msg="Timeout exceeded: try increasing it by passing --timeout option"

Consider increasing golangci-lint timeout in a first commit to something like 5m here.

[kaworu]

Thanks @glrf, patch LGTM.

Note for reviewers: the huge diff in the first commit updating cilium is caused by cilium/cilium#27854 which is pulling in the whole Cilium policy modules into the Hubble API (see this main branch commit). I was curious and did this to investigate:

% go get github.com/cilium/cilium@86a6ab94fdf286971fb26cca97f4c2d0cc15da74
% go mod tidy && go mod vendor && go mod verify
% git add .
% git diff --cached --shortstat
 82 files changed, 4199 insertions(+), 1588 deletions(-)

% go get github.com/cilium/cilium@6fcad1351103594602767024c1e2d17816f69f34
% go mod tidy && go mod vendor && go mod verify
% git add .
% git diff --cached --shortstat
 3756 files changed, 1072929 insertions(+), 1704 deletions(-)

[viktor-kurchenko]

LGTM.