feat(video/transcoder): added support for segment template manifest g…

…eneration with DASH (#8242)

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feat: added support for batch mode priority
feat: added support for disabling job processing optimizations
feat: added support for content encryption (DRM)

PiperOrigin-RevId: 546916731

Source-Link: https://togithub.com/googleapis/googleapis/commit/f1f8ba403f520dcc391335494e3065966f7368b5

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/6ddcc2dd82bba93cbdfe397eeef162e5a403d58d
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNmRkY2MyZGQ4MmJiYTkzY2JkZmUzOTdlZWVmMTYyZTVhNDAzZDU4ZCJ9