add support for sha512 in search

[monperrus]

Context

NPM attestations uses sha512,

eg rekor-cli search --sha 1fd6bbe16d7972d5ec0e6027b078ab6f37e0c8841a7f446020bd05c67536fd8fe47fbfe0366a1b2d8f4d79bb3e0223ac14d7755afcdc3e586991ff0e6243b094

Actual behavior

rekor does not support search for NPM packages via sha512

UI error:

Entered value does not match the hash format: '^(sha256:)?[0-9a-fA-F]{64}$|^(sha1:)?[0-9a-fA-F]{40}$'

Expected behavior

rekor supports search via sha512 by copy pasting the NPM sha512 as hash in the searchbox

[letmaik]

rekor-search-ui/src/modules/api/rekor_api.ts

Lines 63 to 70 in 1ba11b1

	case "hash":
	let query = search.query;
	if (!query.startsWith("sha256:")) {
	query = `sha256:${query}`;
	}
	return queryEntries(client, {
	hash: query,
	});