Upgrade all Go dependencies

[EdSchouten]

THis requires us to catch up with the following API changes:

• The go-winfsp package has changed owners. Patch up all imports.

• pkg/digest's NewHasher() and NewGenerator() now require the expected size to be exact. Call FileReader.Len() to obtain the file's size.

• Change HoleSource to no longer inherit FileReader, as we shouldn't provide an implementation of Len().

[aspect-workflows]

Test

18 test targets passed

Targets

//pkg/blobstore:blobstore_test [k8-fastbuild]                                         66ms
//pkg/builder:builder_test [k8-fastbuild]                                             210ms
//pkg/cas:cas_test [k8-fastbuild]                                                     67ms
//pkg/cleaner:cleaner_test [k8-fastbuild]                                             73ms
//pkg/clock:clock_test [k8-fastbuild]                                                 88ms
//pkg/filesystem/access:access_test [k8-fastbuild]                                    157ms
//pkg/filesystem/pool:pool_test [k8-fastbuild]                                        216ms
//pkg/filesystem/virtual/fuse:fuse_test [k8-fastbuild]                                180ms
//pkg/filesystem/virtual/nfsv4:nfsv4_test [k8-fastbuild]                              187ms
//pkg/filesystem/virtual:virtual_test [k8-fastbuild]                                  136ms
//pkg/filesystem:filesystem_test [k8-fastbuild]                                       152ms
//pkg/runner:runner_test [k8-fastbuild]                                               74ms
//pkg/scheduler/initialsizeclass:initialsizeclass_test [k8-fastbuild]                 66ms
//pkg/scheduler/invocation:invocation_test [k8-fastbuild]                             105ms
//pkg/scheduler/platform:platform_test [k8-fastbuild]                                 102ms
//pkg/scheduler/routing:routing_test [k8-fastbuild]                                   110ms
//pkg/scheduler:scheduler_test [k8-fastbuild]                                         429ms
//pkg/sync:sync_test [k8-fastbuild]                                                   43ms

Total test execution time was 2s. 1 test (5.3%) was fully cached saving 97ms.