http: set flush_on_worker_key_change only when templateURL+batches ar… #210

Job	Run time
create-source-tarball	1m 56s
create-packages / almalinux-8	3m 47s
create-packages / almalinux-9	6m 45s
create-packages / debian-bookworm	6m 3s
create-packages / debian-testing	5m 56s
create-packages / fedora-41	6m 53s
create-packages / ubuntu-noble	7m 55s
	39m 15s

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