render templates with external functions #1337

Job	Run time
Determine Go toolchain version	8s
get-product-version	3s
generate-metadata-file	31s
Go 1.21.6 darwin amd64 build	1m 7s
Go 1.21.6 darwin arm64 build	44s
Go 1.21.6 linux arm build	1m 2s
Go 1.21.6 freebsd 386 build	22s
Go 1.21.6 linux arm64 build	1m 9s
Go 1.21.6 freebsd amd64 build	34s
Go 1.21.6 linux 386 build	1m 6s
Go 1.21.6 freebsd arm build	36s
Go 1.21.6 linux amd64 build	1m 8s
Go 1.21.6 windows 386 build	41s
Go 1.21.6 windows amd64 build	29s
Go 1.21.6 netbsd 386 build	34s
Go 1.21.6 netbsd amd64 build	32s
Go 1.21.6 netbsd arm build	31s
Go 1.21.6 openbsd 386 build	36s
Go 1.21.6 openbsd amd64 build	23s
Go 1.21.6 openbsd arm build	20s
Go 1.21.6 solaris amd64 build	38s
Docker arm default release build	26s
Docker arm64 default release build	32s
Docker 386 default release build	39s
Docker amd64 default release build	27s
	15m 18s

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