…upstream-release-1.5

Automatic merge from submit-queue

Automated cherry pick of #39311

Cherry pick of #39311 on release-1.5.

#39311: Check if pathExists before performing Unmount

Automatic merge from submit-queue (batch tested with PRs 39768, 39463)

Check if path exists before performing unmount

This is part 3 of an effort to check if path exists before performing an unmount operation.
[Part 1](#38547) and [part 2](#39311) involved auditing the different volume plugins and refactoring their `TearDownAt()s` to use the common util function/or create one if absent.

The ideal way to do this change would involve refactoring of the `TearDownAt()s` of these plugins and make a common util function that checks path. (The plugins involved in this PR use someway of unmounting a bind mount and unmounting a global path, there is also refactoring needed to consolidate disk_manager of fc, rbd and iscsi). A non-goal part of this effort can also involve refactoring all the `SetupAt()s`

In the interest of time and considering other higher priority issues that I am caught up with, I am unable to give the time the refactoring needs. Hence I've made the minimum change that would give the desired output.

I am tracking the work pending in this issue: #39251

```release-note
NONE
```

#39768-#38547-origin-release-1.4

Automated cherry pick of #39311 #39768 #38547

Automatic merge from submit-queue (batch tested with PRs 39768, 39463)

Check if path exists before performing unmount

This is part 3 of an effort to check if path exists before performing an unmount operation.
[Part 1](kubernetes/kubernetes#38547) and [part 2](kubernetes/kubernetes#39311) involved auditing the different volume plugins and refactoring their `TearDownAt()s` to use the common util function/or create one if absent.

The ideal way to do this change would involve refactoring of the `TearDownAt()s` of these plugins and make a common util function that checks path. (The plugins involved in this PR use someway of unmounting a bind mount and unmounting a global path, there is also refactoring needed to consolidate disk_manager of fc, rbd and iscsi). A non-goal part of this effort can also involve refactoring all the `SetupAt()s`

In the interest of time and considering other higher priority issues that I am caught up with, I am unable to give the time the refactoring needs. Hence I've made the minimum change that would give the desired output.

I am tracking the work pending in this issue: kubernetes/kubernetes#39251

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 39768, 39463)

Check if path exists before performing unmount

This is part 3 of an effort to check if path exists before performing an unmount operation.
[Part 1](kubernetes/kubernetes#38547) and [part 2](kubernetes/kubernetes#39311) involved auditing the different volume plugins and refactoring their `TearDownAt()s` to use the common util function/or create one if absent.

The ideal way to do this change would involve refactoring of the `TearDownAt()s` of these plugins and make a common util function that checks path. (The plugins involved in this PR use someway of unmounting a bind mount and unmounting a global path, there is also refactoring needed to consolidate disk_manager of fc, rbd and iscsi). A non-goal part of this effort can also involve refactoring all the `SetupAt()s`

In the interest of time and considering other higher priority issues that I am caught up with, I am unable to give the time the refactoring needs. Hence I've made the minimum change that would give the desired output.

I am tracking the work pending in this issue: kubernetes/kubernetes#39251

```release-note
NONE
```