Use s3 for preprocessor cache location

[trxcllnt]

This PR uses S3 as the location for the preprocessor cache. It also adds devcontainer-utils-sccache-dist-status --watch, which can be used as a handy way to watch the sccache client and build cluster:

$ devcontainer-utils-sccache-dist-status -c8 -w
Every 1.0s: devcontainer-utils-sccache-dist-status -c8 -w             587a5cfdd438: Wed Nov 19 19:55:09 2025

sccache procs: 1
preprocessed tempfiles: 0  (0)
nvcc internal tempfiles: 0 (0)

    time      type        id  servers  cpus    util  jobs  loading  pending  running  max  accepted  finished  seen
07:55...  sched...  https...        4   228  36.02%    92        0        0       92  42s     29201     29109    1s
07:55...    server  i-00a...        -    57  31.39%    20        0        0       20  41s      6000      5980    1s
07:55...    server  i-02a...        -    57  42.31%    26        0        0       26  39s      5896      5870    2s
07:55...    server  i-08a...        -    57  35.98%    24        0        0       24  40s     11468     11444    1s
07:55...    server  i-0b2...        -    57  34.41%    22        0        0       22  38s      5837      5815    2s

Queued compilations                   0
Pending compilations                  0
Pending cache lookups                 0
Active compilations                   0
Compile requests                      0
Compile requests executed             0
Compile request errors                0
Cache hits                            0
Preprocessor cache hits               0
Cache misses                          0
Preprocessor cache misses             0
Cache hits rate                       -
Cache timeouts                        0
Cache read errors                     0
Forced recaches                       0
Cache write errors                    0
Compilations                          0
Compilation failures                  0
Non-cacheable compilations            0
Non-cacheable calls                   0
Non-compilation calls                 0
Unsupported compiler calls            0
Average cache write               0.000 s
Average compiler                  0.000 s
Average cache read hit            0.000 s
Fatal errors                          0
Successful distributed compiles       0
Failed distributed compilations       0
Cache location                  Local disk: "/home/coder/.cache/sccache/"
                                s3, name: rapids-sccache-devs, prefix: /
Use direct/preprocessor mode?   yes
Version (client)                0.12.0-rapids.21
Max cache size                      100 GiB

[rockhowse]

CI changes are consistent with those seen in other repos undergoing sccache-dist work.

One small question about 25.12.1 version bump for devcontainer-utils