render templates with external functions #1338

Job	Run time
get-product-version	4s
Determine Go toolchain version	4s
Go 1.21.6 darwin amd64 build	1m 5s
Go 1.21.6 freebsd 386 build	22s
generate-metadata-file	27s
Go 1.21.6 darwin arm64 build	40s
Go 1.21.6 freebsd amd64 build	27s
Go 1.21.6 linux arm build	1m 14s
Go 1.21.6 linux arm64 build	57s
Go 1.21.6 freebsd arm build	25s
Go 1.21.6 windows 386 build	33s
Go 1.21.6 linux 386 build	1m 1s
Go 1.21.6 windows amd64 build	28s
Go 1.21.6 linux amd64 build	1m 11s
Go 1.21.6 netbsd 386 build	25s
Go 1.21.6 netbsd amd64 build	52s
Go 1.21.6 netbsd arm build	25s
Go 1.21.6 openbsd 386 build	33s
Go 1.21.6 openbsd amd64 build	46s
Go 1.21.6 openbsd arm build	46s
Go 1.21.6 solaris amd64 build	22s
Docker arm default release build	35s
Docker arm64 default release build	36s
Docker 386 default release build	38s
Docker amd64 default release build	21s
	15m 17s

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