changed holod to listen to [::] instead of [::1]

[frederic-loui]

holod grpc server/gnmi now listen to all interfaces instead of IPv6 [::1] localhost. This was needed to test access to holod from different a host with:

holo-cli --address "http://<ipv4/ipv6>:<port>"

with that change holo container can also be accessed from any containerlab out of band IP address.

+---+----------------+--------------+--------------------------------------------------+-------+---------+----------------+----------------------+
| # |      Name      | Container ID |                      Image                       | Kind  |  State  |  IPv4 Address  |     IPv6 Address     |
+---+----------------+--------------+--------------------------------------------------+-------+---------+----------------+----------------------+
| 1 | clab-ripv2-rt1 | 5579bc41ccf6 | holo:floui                                       | linux | running | 172.20.20.4/24 | 2001:172:20:20::4/64 |
| 2 | clab-ripv2-rt2 | 31e314d319e0 | holo:floui                                       | linux | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
| 3 | clab-ripv2-rt3 | fdbc1114e452 | holo:floui                                       | linux | running | 172.20.20.6/24 | 2001:172:20:20::6/64 |
| 4 | clab-ripv2-rt4 | d8de473f9700 | holo:floui                                       | linux | running | 172.20.20.7/24 | 2001:172:20:20::7/64 |
| 5 | clab-ripv2-rt5 | 7d4b0f125fb7 | holo:floui                                       | linux | running | 172.20.20.3/24 | 2001:172:20:20::3/64 |
| 6 | clab-ripv2-rt6 | df5d2b0b696f | holo:floui                                       | linux | running | 172.20.20.8/24 | 2001:172:20:20::8/64 |
| 7 | clab-ripv2-rt7 | 23e5005fb00e | ghcr.io/rare-freertr/freertr-containerlab:latest | rare  | running | 172.20.20.5/24 | 2001:172:20:20::5/64 |
+---+----------------+--------------+--------------------------------------------------+-------+---------+----------------+----------------------+

• from containerlab host os:

  ❯ target/debug/holo-cli --address http://172.20.20.4:50051
  holo# show running
  !
  interfaces interface lo
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  interfaces interface eth1
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  routing control-plane-protocols control-plane-protocol ietf-rip:ripv2 main
  !
  rip interfaces interface lo
  !
  rip interfaces interface eth1
  !
  holo#

• holo-cli can now be used to access any router in containerlab lab:

  ❯ target/debug/holo-cli --address http://172.20.20.4:50051
  holo# show running
  !
  interfaces interface lo
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  interfaces interface eth1
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  routing control-plane-protocols control-plane-protocol ietf-rip:ripv2 main
  !
  rip interfaces interface lo
  !
  rip interfaces interface eth1
  !
  holo# exit
  ❯ target/debug/holo-cli --address http://172.20.20.6:50051
  holo#
  holo#
  holo# show running
  !
  interfaces interface lo
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  interfaces interface eth1
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  interfaces interface eth2
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  interfaces interface eth3
  type iana-if-type:ethernetCsmacd
  ipv4
  !
  routing control-plane-protocols control-plane-protocol ietf-rip:ripv2 main
  !
  rip interfaces interface lo
  !
  rip interfaces interface eth1
  !
  rip interfaces interface eth2
  !
  rip interfaces interface eth3
  !
  holo#

• In case of space/storage constraint holo-cli can be unbundled from holo (i.e similar toholo` container)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 60.42%. Comparing base (8d360eb) to head (0f211fc). Report is 6 commits behind head on master.

:exclamation: Current head 0f211fc differs from pull request most recent head c013e3c. Consider uploading reports for the commit c013e3c to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #18 +/- ## ======================================= Coverage 60.42% 60.42% ======================================= Files 179 179 Lines 31812 31812 ======================================= Hits 19222 19222 Misses 12590 12590 ```

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