fix: reject BlobTxs larger than 2 MiB #6320

Job	Run time
goreleaser / goreleaser-check	1m 38s
lint / golangci-lint	2m 47s
lint / yamllint	6s
markdown-linter / markdown-link-check	2m 40s
markdown-linter / markdown-lint	12s
test / test	10m 47s
test / test-coverage	5m 11s
test / test-race	7m 41s
test / test-short	4m 2s
test / test-fuzz	5m 38s
lint / hadolint / hadolint	8s
goreleaser / goreleaser	0s
	40m 50s

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