fix: use podman exec in podman runtime

[bewing]

No description provided.

[codecov]

Codecov Report

Merging #1653 (6b09215) into main (ca9c72b) will increase coverage by 0.02%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1653      +/-   ##
==========================================
+ Coverage   50.83%   50.85%   +0.02%     
==========================================
  Files         135      135              
  Lines       13107    13107              
==========================================
+ Hits         6663     6666       +3     
+ Misses       5711     5708       -3     
  Partials      733      733              

Files	Coverage Δ
utils/networkcli.go	72.34% <ø> (ø)

... and 2 files with indirect coverage changes

[bewing]

Before: endless loop on cEOS deploy:

# containerlab -r podman deploy --debug
...
DEBU[0000] clab-ztp-tor2 - Cli not ready (exec: no command) - waiting.
DEBU[0000] clab-ztp-tor1 - Cli not ready (exec: no command) - waiting.
DEBU[0000] clab-ztp-spine - Cli not ready (exec: no command) - waiting.
DEBU[0002] clab-ztp-tor1 - Cli not ready (exec: no command) - waiting.
DEBU[0002] clab-ztp-spine - Cli not ready (exec: no command) - waiting.
DEBU[0002] clab-ztp-tor2 - Cli not ready (exec: no command) - waiting.
DEBU[0004] clab-ztp-spine - Cli not ready (exec: no command) - waiting.
DEBU[0004] clab-ztp-tor1 - Cli not ready (exec: no command) - waiting.
DEBU[0004] clab-ztp-tor2 - Cli not ready (exec: no command) - waiting.
...

After:

# containerlab -r podman deploy --debug
DEBU[0004] clab-ztp-spine - Cli not ready (read /dev/ptmx: input/output error) - waiting.
DEBU[0004] clab-ztp-tor2 - Cli not ready (read /dev/ptmx: input/output error) - waiting.
DEBU[0004] clab-ztp-tor1 - Cli not ready (read /dev/ptmx: input/output error) - waiting.
...
DEBU[0013] clab-ztp-tor2 - Cli not ready (errPrivilegeError: failed to acquire target privilege level 'privilege-exec') - waiting.
DEBU[0014] clab-ztp-tor1 - Cli not ready (errPrivilegeError: failed to acquire target privilege level 'privilege-exec') - waiting.
DEBU[0014] clab-ztp-spine - Cli not ready (errPrivilegeError: failed to acquire target privilege level 'privilege-exec') - waiting.
DEBU[0021] clab-ztp-tor1 - Cli ready.
DEBU[0022] clab-ztp-tor2 - Cli ready.
DEBU[0022] clab-ztp-spine - Cli ready.
...