Update from update/networkservicemesh/sdk

[nsmbot]

Update go.mod and go.sum to latest version from networkservicemesh/sdk@main PR link: https://github.com/networkservicemesh/sdk/pull/1479 Commit: 7ec603e Author: Denis Tingaikin Date: 2023-07-05 11:34:52 +0300 Message:

• fix: nsmgr should keep fowarder while conn is fine (# 1479)
  • fix: nsmgr should keep fowarder while conn is fine Signed-off-by: Denis Tingaikin denis.tingajkin@xored.com

  • fix critical linter issue Signed-off-by: Denis Tingaikin denis.tingajkin@xored.com