pkg upgrade --fetch-only prompts don't reflect the flag. [UI Improvement / nice to have]

[eborisch]

When pkg upgrade --fetch-only is used, the prompts provided to the user don't reflect this fact. For example,

# pkg upgrade --fetch-only
[...]
        py311-websocket-client: 1.8.0

Number of packages to be removed: 29
Number of packages to be installed: 49
Number of packages to be upgraded: 20
Number of packages to be reinstalled: 31

The operation will free 177 MiB.

Proceed with this action? [y/N]: y
Checking integrity... done (0 conflicting)
#

This is not high-priority, but it would be nice to have something similar to this notice from yum upgrade --downloadonly:

# yum upgrade --downloadonly
[...]
 kernel-modules            x86_64 4.18.0-553.115.1.el8_10       @baseos    25 M

Transaction Summary
================================================================================
Install   10 Packages
Upgrade  167 Packages
Remove     4 Packages

Total download size: 1.4 G
YUM will only download packages for the transaction.    #### Shows up when '--downloadonly' passed
Is this ok [y/N]: y
Downloading Packages:
(1/177): gcc-toolset-15-gcc-c++-15.2.1-7.1.el8_ 6.3 MB/s |  17 MB     00:02
[...]