Remove main push from `bump-zed-minor-versions` script #37797

Job	Run time
(macOS) Run Clippy and tests	6m 12s
(Linux) Build Remote Server	1m 30s
(Linux) Run Clippy and tests	15m 43s
Check Postgres and Protobuf migrations, mergability	14s
Check formatting and spelling	32s
(Windows) Run Clippy and tests	7m 9s
Create a macOS bundle	0s
Create a Linux bundle	0s
Create arm64 Linux bundle	0s
Auto release preview	0s
	31m 20s

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