REF/TST: resample/test_base.py
follow-on from #24377
xref #25197

in #24377, the `pytest_generate_tests` hook was used to parametrize the base tests over date_range, period_range and timedelta_range indexes.

to make it easier to understand the code and use less pytest magic, this PR uses a simpler approach of applying markers to the tests instead of having the test name ending in _all_ts.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=h1) Report
> Merging [#25262](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/5f73594d49ea06ada4c6779006c00aaf41935595?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25262/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #25262   +/-   ##
=======================================
  Coverage   91.93%   91.93%           
=======================================
  Files         166      166           
  Lines       52187    52187           
=======================================
  Hits        47978    47978           
  Misses       4209     4209
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.48% <ø> (ø)` | :arrow_up: |
| #single | `42.14% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=footer). Last update [5f73594...dcec0d4](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=h1) Report
> Merging [#25262](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/5f73594d49ea06ada4c6779006c00aaf41935595?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25262/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #25262   +/-   ##
=======================================
  Coverage   91.93%   91.93%           
=======================================
  Files         166      166           
  Lines       52187    52187           
=======================================
  Hits        47978    47978           
  Misses       4209     4209
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.48% <ø> (ø)` | :arrow_up: |
| #single | `42.14% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=footer). Last update [5f73594...dcec0d4](https://codecov.io/gh/pandas-dev/pandas/pull/25262?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks @simonjayhawkins much cleaner! @MeeseeksDev backport to 0.24.x