fix: reject BlobTxs larger than 2 MiB #6344

Job	Run time
lint / golangci-lint	2m 52s
goreleaser / goreleaser-check	1m 39s
lint / yamllint	29s
markdown-linter / markdown-link-check	2m 29s
markdown-linter / markdown-lint	8s
test / test	11m 0s
test / test-coverage	5m 21s
test / test-fuzz	5m 40s
test / test-race	7m 33s
test / test-short	4m 6s
lint / hadolint / hadolint	10s
goreleaser / goreleaser	0s
	41m 27s

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